Automatic control for concrete pavers



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. l r. kwis Patented May 16, 1939 PATENT OFFICE AUTOMATIC CONTROL FOR CONCRETE PAVERS Axel E. Lundbye, Nunda,.N. Y., assignor to The Foote Company, Inc., Nunda, N. Y., a corporation of Delaware Application November 6, 1936, Serial No. 109,585

21 Claims.

My invention relates to certain new and useful improvements in concrete pavers, and more especially to an automatic control therefor.

The invention in its broadest aspects is some- *what similar in type to the automatic control for concrete pavers set forth in the patent of George E. Blood, Number 1,879,051, of September 27, 1932.

One of the principal objects of the present invention is to provide a simplified control mechanism wherein the operation of one handle or lever will cause various mechanisms to function, so that the skip will be elevated, the water automatically supplied to the mixing drum, the batch meter set in operation and thereby lock the discharge chute in a closed position for a set period of time, lock the water control, automatically unlock the discharge chute, means for opening the same,and automatically stop the skip after it has reached its upper limit of travel.

Still another object of the invention is to so arrange the automatic control that after the cycle of operation has been completed, the skip may be manually lowered by' the operation of the aforementioned handle and the automatic mechanism be again in condition for the next cycle of operation.

Still another object of the present invention is to provide an automatic control mechanism (the parts also being capable of manual operation) whereby a cycle, that is, from the raising of the I skip to the discharge of the aggregates from the drum, can be completed in a minimum period without any loss between the several operations. For instance, the skip may be timed to discharge into the drum in eight and one-half seconds, while the drum can be discharged in seven and one-half seconds. Thus, the drum can be completely emptied while the skip is being elevated. In a like manner, the water tank can be controlled 40 to empty into the drum in, say, seventeen seconds, although the batch meter for controlling the flow of water to the drum may be set to lock this control for twenty-two seconds, thus making sure that the entire amount of water in the tank will be discharged into the mixing drum within the time period.

Still another object of the invention is to provide an automatic controL'as well as a. manual control, which is operated by the main control lever, which, in turn, has a finger lever thereon, so

that if it should be desired to operate thecontrols manually, this may be accomplished by simply grasping the finger lever and the aforementioned main controllever, which .will prevent the automatlc cycle of operations from taking place, and,

by the remaining several levers.

Furthermore, the skip is to be lowered manually by the operation of this main control lever, and this, also, is made possible by providing the finger 5 lever on the main control lever and its attachments, as will be shortly described.

Still another object of the invention is to provide a mechanism for automatically controlling the elevation of the skip, functioning of the water 10 control and the power discharge, and for efficiently manually controlling these operations, as well as manually controlling the inward and outward movement of the bucket on the boom and the swinging of the boom to the desired position. 15

It will be understood that when the term "manually controlled" is used, it denotes that the individual mechanism to be operated is caused to be set into motion by the manual moving of individual control levers, whereas when automatic con- 20 trol is mentioned, it means that after one lever is operated, various other mechanisms are automatically thrown into operation to cause other interconnected parts to function.

Still another object of the invention is to pro- 25 vide a simple and efllcient automatic knock-out mechanism, which is automatically affected by the opening and closing of the discharge chute, by the operation of the main control lever, and by the elevation of the skip. Thus, when the discharge 30 chute is closed, the knock-out mechanism is always in a functioning position (unless locked by the batch meter) to be operated by the automatic control lever (as well as by its own lever), whereas, when the discharge chute is open, the knock-out 35 mechanism will be in a position to be automatically operated, not by the automatic control lever but by the elevation of the skip.

Still another object of the invention is to provide a simple and eflicient knock-out mechanism 40 for effecting the opening and closing of the discharge chute and to' provide means for manually operating the opening and closing of the discharge chute whenever desired (unless locked by the batch meter). 45

Still another object of the invention is to provide a manual and automatic control mechanism for concrete payers, wherein the automatic control of the cycle (that is, the elevation of the skip,

control of the cycle is cut out and thevarious parts may be caused to function by their respective levers, manually.

Still another object of the invention is to provide'a mechanism, wherein water may be supplied to the drum for flushing the same without throwing into operation the mechanism which automatically controls the entire cycle; also to provide mechanism wherein the water control may be thrown out of operation at anytime, even though the automatic control mechanism has been thrown into functioning positions.

Still another object of the invention is to so arrange the control/mechanism that with but the operation (that is, the manual operation) of one lever, the aggregates will be raised and deposited in the mixing drum, the discharge chute will be closed, the water will be turned on, the batch will be mixed for the desired time period, and then the discharge chute automatically be opened.

Furthermore, with the same lever, the skip may be lowered and the automatic mechanism may be cut out by simply pressing a finger lever on this main control lever.

Still another object of the invention is to provide a set of control levers for the'control of the individual mechanisms and functions of the machine, but to so arrange the control mechanism that their operation is not necessary to perform the cycle if the main control lever is operated.

Still another object of the invention is to provide an automatic control mechanism, wherein sequences can be timed so that even seconds are not lost between the various automatic operations, thereby making it possible to lay the concrete in the shortest possible time.

Still another object of the invention is to provide an automatic control mechanism, wherein the various parts may be readily applied without any material changes in the paver.

With these and numerous other objects in view, which will be pointed. out as the specification proceeds, the invention consists in certain new and novel arrangements and combination of parts, as will be hereinafter more fully explained and pointed out in the claims.

Referring now to the drawings showing a preferred embodiment:

Fig. 1 is a side elevation of the control mechanism with as much of the paver and its parts as thought necessary to illustrate the present invention;

Fig. 2 is a general plan view of the paver, together with parts of the automatic control mechanism;

Fig. 3 is a front elevation of the paver shown in Figs. 1 and 2, together, with the lever D and part of the mechanism for moving the bucket along the boom;

Fig. 4 is a view similar to Fig. 3, illustrating the planetary power discharge chute and the control mechanism, the discharge chute being shown in its open position and in dot and dash'lines showing its closed position;

Fig. 5 is a detail elevation of the skip-operating control mechanism showing the main automatic control lever A, together with its finger lever and showing the parts in a normal or non-operating position;

Fig. 6 is a similar view with the main control lever having been moved to an operating position;

Fig. 6 is a detail of part of the mechanism shown in Figs. 5 and 6 and showing the skip hoist clutch in its operative position;

Fig. 6 is a fragmentary detail of the brake associated with the skip hoist clutch, showing the brake in its released position;

Fig. 7 is an enlarged side elevation, partly in section, showing the various control levers, knockout mechanism, and the shaft on which the control levers are mounted, the control mechanism being in a position to be operated by the automatic control lever A and the knock-out mechanism being in the position it assumes when the discharge chute is closed;

Fig. 8 is a fragmentary detail showing a cam and rocker arm associated with the skip for operating the knock-out mechanism during the elevation of the skip;

Fig. 9 is a fragmentary detail section of the knock-out mechanism, showing the position of the knock-out mechanism parts when the discharge chute is in a closed position;

Fig. 10 is a similar top plan view of the same;

Fig. 11 is a fragmentary detail section of the finger keyed to the shaft for operating a part of the knock-out mechanism;

Fig. 12 is a similar view of a similar finger, but

keyed to a sleeve, for operating the same partof the knock-out mechanism;

Fig. 13 is a fragmentary detail sectional view similar to Fig. 9, showing the arrangement of the parts of the knock-out mechanism when the discharge chute is in an open position;

Fig. 14 is a top plan view of the same;

Fig. 15 is a fragmentary detail view, showing the means for controlling the inward and outward movement of the bucket along the boom;

Fig. 16 is a fragmentary detail of the control for the manual operation of the water, showing a throw-over stop whereby the control may be operated without looking the same with relation to the batch meter;

Fig-16 is a view similar to Fig. 16 slightly enlarged and additionally showing the rod from the water control associated with the look from the batch meter; I

Fig. 16 is a side elevation of the lock arrangement from the batch meter, showing the latch in an unlocked position;

Fig. 16 is a detail view showing the throwover stop connected with the manual water control mechanism, as shown in Figs. 16, 16 and 16 to permit a flushing of the mixing drum' without looking the water control with relation to the batch meter;

Fig. 17 is a detail of the throw-over stop and mounting therefor, the throw-over stop being in inoperative position;

Fig. 18 is a front elevation of the batch meter.

with the door removed and its connections with the water control, discharge chute, and skip;

Fig. 19 is a detail section of the latch mechanism, shown in Figs. 16- and 16 Fig. 20 is an enlarged detail sectional plan View showing the sleeve, shaft, clutch, and arms, all operated by the elevation of the skip, and taken along the shaft S--i, Fig. 1;

Fig. 21 is a sectional elevation on the line 2l--2| of Fig. 20;

Fig. 22 is a detail view of the water tank and its various connections, parts being broken away for the sake of clearness;

Fig. 23 is a detail of the lower portion of the water tank with the valves being shown in the reversed position to those shown in Fig. 22;

Fig. 24 is a fragmentary detail showing the locking mechanism associated with the batch meter for preventing the movement of the power discharge chute lever until the batch meter releases the same; and

Fig. 25 is a detail showing a connection between the skip and the skip hoist for throwing out the skip hoist clutch and applying the brake.

At the outset, it might be mentioned that the planetary discharge per se is not a part of the present invention and is shown and described in detail in the patent granted to Charles E. Foote on November 10, 1925, Number 1,561,144. Likewise, the water tank, with but a few changes, is shown and described in Patent Number 1,879,- 051, granted September 27, 1932, to George E. Blood. Also, the batch meter, with but one or two changes, is shown in the patent granted to Charles E. Foote, Number 1,419,451, on June 13, 1922, while in the patent of George E. Blood, Number 1,879,051, a knock-out and control mechanism ofthe same general type for a paver is shown and described.

'It will also be understood that the present 'invention relates to the control of the various parts of the concrete paver, so that from the moment the aggregates are elevated in the skip until the time they are discharged from the discharge chute, the operations are automatically controlled by the initial movement of the main control lever and the continued rise of the skip.

It will further be understood that only as much of the paver is shown and described as thought necessary to have a full understanding of the present control mechanism.

As is well known to those skilled in the art, in the operation of a concrete paver, various mechanisms have been tried, wherein, after the skip has been startedin its upward movement, the water supply is automatically turned on, the discharge chute is locked against opening until the drum has rotated a predetermined number of times, or, in other words, a predetermined amount of time, this being possible through the provision of a batch meter, after which period of time the discharge chute is unlocked, so that the aggregates may then be discharged into the bucket to be run out along the boom.

The present controlmechanism is also so arranged that besides these features being automatically started by the operation of one lever, as will be hereinafter explained in detail, the several mechanisms may also be operated and controlled manually, the automatic control being thrown out of operation by simply grasping a finger lever while operating the main control lever.

' THE INVENTION IN GENERAL The present control mechanism for the paver is featured by five separate levers, consisting of,

first, the hand lever A, which is the main control lever and initiates themovernent of the skip hoist and automatically starts variousother mechanisms in certain timed relation; second, the lever B for manually operating the water control; third, the lever C for manually operating the power discharge, which lever is also affected at certain times by the movement of the lever A; fourth, the lever D for manually operating the bucket drive; and, fifth, the lever E for traversing the boom.

Also, there is always provided means for elevating the boom, but this forms no part of the I present invention.

In the automatic control mechanism, about to be described, there are, from the initial movebucket, a number of parts that go into and out of operation, such as knock-out mechanisms, release setting mechanisms, and various other automatic controls, which will be shortly described more in detail.

Referring now for the moment, generally, to the paver and to Fig. 1, there are shown a superstructure I, the conventional mixing drum 2, with its ring gears 3, which are driven from pinions on the main power shaft connected with the engine (not shown) on the paver.

There are also shown a portion of the inner end of the boom 4 and the cable drum C--8 extending outwardly over the inner end of the boom for running the bucket 5 inwardly and outwardly along the boom.

This is accomplished by running the bucket cable drum C8 in a clockwise or anti-clockwise direction, which will be explained more in detail hereinafter (see Figs. 3 and 15).

There may also be seen in Figs. 1 and 4 the power-operated discharge chute 6, which, in Fig. 4, is in its open position. This discharge chute is operated by a planetary discharge mechanism, which mechanism is shown in the patent referred to, Number 1,561,144, granted to Charles E. Foote.

Still referring to Fig. 1, there may be seen a skip hoist cable drum 1 for operating the skip S, together with the clutch 8 for throwing into and out of operation this skip hoist drum 1. There is also provided the brake 9, which is always engaged when the clutch is thrown into its inoperative position. The cable l0 extends from the skip hoist drum 1 upwardly over the sheave ll carried by the frame I! and is attached to the skip S so that when the cable is wound on the drum, the skip will be elevated, and when the cable unwinds or pays off, the skip will be lowered in the well known manner.

In Fig. 1, there may be seen the outline of the batch meter, shown generally as at l3 and in detail in Fig. 18, which batch meter is illustrated in the Patent Number 1,419,451, heretofore mentioned, of Charles E. Foote. However, there have been additional functions added to the batch meter, which will be described as the specification proceeds.

Still referring to Fig. 1, there may be seen the .operators platform P, while conveniently positioned for the operator are the heretofore-mentioned levers A, B, C, D, and E, all of which are mounted at their lower ends on the shaft 5-, certain of the levers being keyed to the shaft and others being loosely mounted thereon, as will be hereinafter mentioned.

There will also be seen the lower shaft Sl5, which is operated in a clockwise direction, as will be hereinafter mentioned, by the movement of the lever A to initiate the movement of the skip and be returned to its normal position (anticlockwise movement) by the upward movement of the skip, as will be shortly described. It is from this shaft S--I5 that the clutch 8 for operating the skip power drum 1 and the brake 9 are actuated.

Elevation of skip Having thus described the above-mentioned parts generally, reference is now made to Figs. 5 to 8, inclusive, which illustrate the hand lever A and its various connections and parts as associated with, first, the skip hoist drum 1, clutch 8, and brake 9.

It also might be mentioned that the operation of this lever A sets into operation the various automatic control mechanisms, unless the finger lever is operated during the movement of the lever A, which would cut out the automatic control mechanism, but this automatic mechanism will be described later.

Referring now specifically to Fig. 5, there is seen the hand lever A loosely mounted on the aforementioned shaft 8-. The lower end of the handle A is provided with the oppositely extending short arms -3 and a4. Connected to the outer end of the arm a3 is the rod l6, which, in turn, is connected at its lower end to the forward end of the arm I 1, which, in turn, is fixed to a. lower shaft S-l5, which extends just below the platform P.

The shaft S| also has an adjacent arm l8a thereon, to which, in turn, is connected the rod l8, which extends downwardly and connects to the arm is fixed on the shaft 20 to thus operate the brake band 2| through the link 22. The brake band 2| works in conjunction with the brake drum 23, which is mounted on the power shaft 24, from which power shaft is driven the skip hoist drum 1 through the reduction gearings 25 and 26; also, the heretofore-mentioned clutch 8 is mounted on the power shaft 24, as may be seen in Fig. 1.

Farther along the shaft Si5 is the arm 21,

to which is connected the rod 28, the lower end of which rod is fixed to an arm 29 of the spanner 30,

which operates the heretofore-mentioned clutch- It might be mentioned here that the brake3 on the power shaft operates slightly in advance of the clutch 8 for the skip hoist, so that if the operator moves the handle A but slightly back and forth, rather than pulling it all the way, he can keep releasing the brake without actuating the clutch to thus lower the skip by gravity.

Still referring to Fig. 5, it will be noticed that to the short arm a-4, there is a supplemental rod a-5 pivoted at its lower end to the foot pedal a-G, which is pivoted, as at 0-1, so that the operator may use both his hand and foot in the manipulation of this main control lever A or may use either one or the other.

As far as the description has proceeded, it will be understood that when the lever A is pulled (disregarding for the moment the automatic arrangement about to be described in connection with the shaft S--3) the shaft S-l 5 will be rocked in a clockwise direction (Fig. 5) to throw into operation the clutch 8 and, at the same time, release the brake band 2|, which will cause the elevation of the skip S through the rotation of the drum 1, thus winding up the cable l0 that is connected to the skip.

After the skip has been elevated, it may be lowered by a slight in and out movement of the main control handle A to thus momentarily release the brake band 23 without actuating the clutch 8.

It might be mentioned that as the skip approaches its uppermost limit of travel, the shaft S-Ii, through a mechanism shortly to be described, is again automatically rocked in the opposite direction to release the clutch 8 and apply the brake to thus hold the skip in its uppermost position until lowered by the operator, as just described. 1

Thus, it will be seen that the skip is started in its elevation by the operation of the handle A and that it is always lowered by an operation of the handle A and that as it reaches its uppere most limit of travel, a clutch is automatically operated for stopping the winding of the skip hoist drum and a brake applied.

Control levers Referring for the moment to Figs. 1 and 7. there will be seen the heretofore-mentioned shaft Sl4, on which the various levers A, B, C, D, and E are mounted. The lever A, which is the main control lever, is the one that is used for lowering and elevating the skip, as just described. It also throws into operation. the automatic control mechanism, about to be described.

Both the levers A and B, the first being the main control lever and the second being the lever for manually controlling the water, are loosely mounted on the shaft Sl4, as at 3| (Fig. 7). The lever C, however, which is used for opening and closing the power discharge manually or to operate it automatically, is keyed to the shaft Sl4, as at 32. The lever D for manually operating the bucket drive, that is, for manually setting into operation the clutch for running the bucket outwardly and inwardly of the boom, is loosely mounted on the shaft Sl4, as at 33.

There is also a short arm F interposed between the lever D and the lever E (not provided with a handle), and this arm F is keyed to the shaft S-l 4, as at 34. The lever E is loosely mounted, as

at 35, on the shaft SI4 and is used to control the traversing of the boom.

Thus, on the shaft Sl4, we have the levers A, B, D, and E loosely mounted, while keyed to the shaft, we have the power discharge control lever C and the short arm F.

It is to be remembered, therefore, that whenever the lever C is operated, either manually or by the operation of lever A or the raising of the skip (as will be explained), it will rock the shaft 8- and will also rock the short arm F, as this lever and arm are both keyed to the shaft Sl4, as just pointed out.

Knock-out mechanism Now still referring to Fig. 7 and also to Fig. 5, there will be seen another shaft 8-3, which extends behind the said levers, and mounted on this shaft behind the levers A to C is the sleeve 36, on which there is rigidly mounted the short arm z-Hl that is to be engaged by a pawl L-l mounted on the small eiqzension L-5 formed on the rear of the main control lever A. This pawl L-l, in turn, is operated from the finger lever L-6 pivoted just below the handle on the lever A. Thus, when the finger lever L-6 is grasped, it will cause the pawl L-4 to elevate, so that a rearward movement of the handle will permit the pawl L-4 to pass above the arm :rl0 in an idle movement.

Should, however, the lever A be pulled without grasping the finger lever L6, the pawl L4 will engage the arm :r-l0 and cause it to rock in a clockwise direction. Inasmuch as the arm :e-IO is mounted on the sleeve 36, it will also cause the sleeve to rock in a clockwise direction.

Referring now to Figs. 7 and 9 to 13, inclusive,

showing the knock-out mechanism associated with the levers A and C, there will be noticed mounted on the left end of shaft 8-3 the control finger x-IS (clearly shown in Fig. 11), this finger being rigidly keyed to the shaft.

Also rigidly keyed to the sleeve 36 mounted on the shaft S3, which terminates just short of control finger r m, is the finger :c--'-| I. Thus, if the shaft S--3 is rocked, it will rock the finger 11-", whereas if the sleeve 66 is rocked, it will will be seen the tops of the two fingers x-ll and a:l6, each of which fits within its respective slide, that is, .r--l I fits within a notch :c-l In of the slide a:--I lb, whereas the finger :l l6 fits within a notch .r-'l6a formed in the slide :r-l6b. These slides have, respectively, a projecting nose a:| lo and :r--l6c.

Now, formed on the lever C is a bracket. 36 through which there is adapted to slide the short pin 5-). On this short pin is the small block 8-3, which will always be either in front of the nose :rl lc or the nose a:l6c of the slides :c-I I b and .r-I6b. When either of these slldes contacts with the block B-3, which, it will be remembered, is mounted on the sliding pin S-I0, it will throw the lever C in the same manner as if it were grasped manually and thrown.

It will also be remembered that the lever C can be manually operated at any time except when locked by the batch meter, but it is to be automatically operated either by the movement of the lever A through the sleeve 36 and the finger :r-ll or by the rocking of the shaft S3,

, which, as will be mentioned later on, is caused by the elevation of the skip, which will, in turn, rock the finger :c--l6 and, through the block 3-3, when it is in front of the nose r-l6c, operate the lever C. It is the lever C, it will be remembered, which is keyed to the shaft Sl4, as is the arm F, which latter is connected with the planetary power discharge, to be shortly mentioned.

Although the planetary power discharge mechanism has not yet been explained, the automatic control will be more readily understood if it is kept in mind that when the small sliding block B-3 is in front of the finger :rll and its slide, as shown in Figs. 7, 9, and 10, the power discharge chute is in its closed position, while when the pin Sl0 and its sliding block B3 is in the position shown in Figs. 13 and 14, in front of the finger x-l6 and its slide, the power discharge chute is always in its open position.

Power discharge chute and mechanism Reference will now be made to the power discharge chute and its connections with the afore mentioned lever F, which, it will be remembered, is keyed, as at 34, to the shaft Sl4. Also, the connection between the power discharge and the sliding pin S-lll associated with the automatic knock-out mechanism will be referred to.

Referring for the moment, therefore, to Fig. 4, the planetary discharge chute is shown in full lines in its open position, and this discharge mechanism per se is shown in the patent to George E. Blood, number 1,879,051, and also in the patent to Charles E. Foote, number 1,561,144. Generally speaking, it consists of the chute 6 (see Fig. 1) extending up into the drum and is mounted in the pivot bracket 6'. The chute is designed to rock into an open or closed position through the movement of the pitman rod 40 connected at its lower end 4| to the chute and at its upper end to the eccentric 42. Also, there is the disc 43 associated with the eccentric, which iscut out, as at 44 and 46, as explained in the aforementioned United States Letters Patent.

Into these notches 44 and 46 fits the small roller 46 mounted on the arm 41, which is pivoted, as at BI6, this arm and roller being, in turn, controlled through the rod 46 connected to the arm F keyed to the shaft 8-14.

Power means (not shown) are connected to the shaft 8-42, on which the disc 43 and eccentric 42 are mounted, so that when the lever ,C is pulled outwardly, it will, through the arm F and rod 46, disengage the roller 46 from the notch 46 and let the disc make half a revolution, which, in turn, will carry the eccentric around to its lowermost position and thus swing the chute to a closed position, all of which latter is explained in detail in the aforementioned Letters Patent.

There will also be noticed the forked arm H through which passes the aforementioned rod 40, and likewise, the stops 56 and 5| mounted, re-

spectively, above and below the forked arm H to engage the arm H and raise or lower it with the opening and closing of the chute.

As shown in Fig. 4, the chute being open will have raised the arm H upwardly to the position shown.

Now, the other end of the arm H is connected by the link 52 to a short arm 52a mounted on one end of the shaft S4, and this shaft S4 is pivotally connected to a short link S-5, which, in turn, is loosely connected to one end of the sliding pin S-lll. By pivoting the link S-5, it may swing outwardly when the lever C is actuated and may also rock when the shaft S-4 is rocked.

As just mentioned, when the chute 6 has swung to its open position, it has elevated the outer end of the arm H, which, being-pivoted at H, has lowered the link 52, and through the arm 62a has rocked the shaft 5-4 in an anti-clockwise direction and will have pulled the sliding pin S--III from the position shown in Figs. '7 and 9 to the position shown in Fig. 13. Thus, it will be seen, as has already been mentioned, that whenever the chute is in its open position, the sliding pin S-lll is in its outermost position, as shown in Fig. 13, and the block B-3 will be in front of the sliding block :z:l6b, which, it will be remembered, is operated by the finger x-l6 keyed to the shaft 8-4.

It will also be understood that when the lever C is again operated, the roller 46 will be pulled from the notch 45 and the disc revolved until the roller 46 falls in the notch 44. The eccentric would then lower and revolve the chute 6 to a closed position, while the stop 50 would press the arm H downwardly, which would force the link 5| upwardly and, in turn, revolve the shaft S4 in a clockwise direction to, in turn, revolve the link 8-5 in a clockwise direction and push the sliding pin S-III inwardly, so that the block 3-3 on the pin Sl0 would now be in front of the slide .rl lb and be in a position to be operated by a rotation of the sleeve 36 on the shaft S-3 through the movement of the finger a:l I.

As far as the specification has proceeded, it will be seen that the manual operation of the lever C will either open or close the power discharge chute, that is, if the discharge chute is in an open position, the movement of the lever will close it, whereas if the chute is in a closed position, the movement of the lever will open it, due to the fact that the lever C and the arm F connected with the planetary discharge mechanism are both keyed to the shaft 8-.

' Again, an operation of the lever A. that is,

' the main control lever, will also, through the automatic knock-out mechanism (that is, the sleeve 36, the finger E -4| and the block 3-3), move the lever C and open the discharge chute 5, provided the discharge chute is in a closed position when the lever A is operated.

However, should the chute 8 be in its open position, the block BI would then be over in front of the finger .r-IS, and consequently. there would be no movement of the lever C, nor a rocking of, the shaft Sll, nor a movement of the arm F, and, therefore, the chute would not be afl'ected.

It is to be remembered, however, that a rocking of the shaft S3, on which the sleeve 36 is mounted, will aflect the automatic mechanism, should the block 3-! be in front of the finger 3-46 (chute in its open position). The rocking of the shaft SI (not the sleeve) is caused by the elevation of the skip, as will be shortly described.

As has Just been mentioned, the elevation of the skip rocks the shaft S3 (Fig. 7) to which, it will be remembered, the finger 12-46 is fastened. Should the discharge chute be open, the block 13-3 will be in front of the finger :c-li, which, in turn, would cause a movement of the handle C and, in turn, rock the shaft Sll and, through the arm F, draw the roller 45 from the notch 45, permitting the planetary to turn a half turn and swing the chute to a closed position and, in turn, revolve the rod S4 and, through the link SS, shoot the pin SIO back, so that the block B-3 will be in front of the sliding block :c-J lb and its finger I The rocking of the shaft S3 is caused by the elevation of 'the skip S but only after the skip has been elevated and turned a sleeve through twenty two and one-half degrees. A

description of the sleeve and shaft, which is operated by the elevation of the skip, will now be set forth in detail;

It might also be mentioned that the rocking of the sleeve and shaft, about to be described,

also controls the discharging of the water to the mixing drum, operates the automatic knockout mechanism, sets into operation the batch meter to lock the discharge mechanism, and

throws out the clutch and puts on the brake for the skip hoist.

Shaft and sleeve operated by the skip The shaft Sl and the sleeve S--L may be seen in Fig. 1, just below the batch meter, and may also be more clearly seen in Fig. 18 and (in the enlarged views) Figs. 20 and 21.

Referring for the moment, therefore, to Figs. 20 and 2.1, there is seen the shaft Sl mounted in the bearings 53 formed sin the brackets 54 (see Fig. 18).

Also mounted on the shaft S-l may be seen the sleeve SL, on which is rigidly journaled the operating arm G, which is adapted to be elevated by contact with the roller 9 mounted near theinner end of the skip S (see Fig. 2).

There is also a clutch connection between the sleeve SL and the shaft Sl, which clutch operates after the sleeve has turned through its twenty-two and one-half degrees. There is a counter-weight 55 on this arm G, so that when the skip is lowered and the shaft S'l returns to its normal position, the sleeve SL will also areas return to its normal position to be in proper functioning condition for the next cycle.

On the end of the sleeve SL, there is welded (see Fig. 18) which, in turn, operates the water tank, as will shortly be described.

It will be seen, therefore, that the skip in raising from its lowered position will, through the arm G and the sleeve SL, actuate the arm z:--5 and the rod R-I to, in turn, rock the shaft S2', which shaft actuates the valves of the water tank W.

Now, on the hub of the lever :c5 is the aforementioned jaw clutch having the teeth 560 that cooperate with the teeth 56?) of the opposing face of a Jaw clutch, which are formed in the hub of the lever :r--l5, which lever, in turn, is keyed to the shaft Sl to actuate the batch meter l3.

These teeth 56a and 56b, however, are so set that the sleeve SL turns through twenty-two and one-half degrees before the teeth 55a contact with the teeth 56b of the opposing face of the clutch in the lever :c--l5. Now, the lever a:-l5, as may be seen in Fig. 18, has an adjustable face block 51 that operates the main control rod 58 of'the batch meter IS, the operation of which will be described after the description of the shaft SI is completed.

Continuing, there is also mounted on the shaft S--l the arm :t-8, which is connected by therod R-4 (Figs. 7 and 8), which rod R-J is provided with the block B2 with the cam face B6 to contact with the roller 59 mounted in the arm 60, which is keyed to the aforementioned shaft S-3, which, it will be remembered, is a part of the automatic knock-out mechanism and has the finger a:--l6 fastened thereto, which will strike the block B3 when it is in front of the arm to thereby actuate the lever C and thus close the discharge chute, if the discharge chute be open, and the block B3 is in front of the finger :r|6, as previously described.

Also fastened on the shaft S--l (Figs. 20 and 21) may be seen the arm :v-il, and to this arm is connected the rod R-lll, on which there is mounted, at its lower end, a sleeve C-| 2 (Fig. 25) with an enlarged head Cl3, the body of the sleeve passing through the elongated opening Ci4 formed on the outer end of the arm :o28, which arm is mounted on the heretofore-mentioned shaft Sl5, which shaft, it will be remembered, through the respective rods l8 and 28, throws into and out of operation the skip hoist clutch 8 and the afore-mentioned brake 9 for the skip hoist clutch.

When the shaft Sl5 is operated by the main control lever A, as shown in Figs. 1, 5, and 6, the shaft Sl5 is rotated (Fig. 5) and the arm :c-28 (Fig. 25) will move downwardly, away from the sleeve head C-l 3, without aifecting the rod Rl 8 with its sleeve (3-42, but as the skip is elevated and rotates the sleeve SL and the shaft Sl (Fig. 20), the arm :r:l1 being keyed thereto will force the rodR-l8 downwardly and, through the enlarged head Cl3 of the sleeve Cl2, will, through the arm $-28, rotate the shaft S--l5 and, through the connecting rods I 8 and 28, release the clutch 8 and apply the brake 8 of the skip hoist.

Water control It will be remembered that as the skip starts to elevate, it rotates the sleeve S- -L, just above described, which is mounted on the shaft S-l to, in turn, actuate the arm a! welded to the sleeve, which arm is connected by the arm 3-1, on which, it will be recalled, is mounted the block B-l that contacts with the roller 59 on the arm H to rock the shaft 8-2 (Figs. 1 and 18).

Now, the shaft 8-2 extends across the paver over to the side with the water tank W, which tank, except for a few changes, is shown and described in Patent Number 1,879,051, granted to George E. Blood, and for a full description, reference may be made to the aforementioned patent.

Explaining the same briefly, so that its connections with the automatic control will be understood, the tank consists of a cylinder 9 I, in which there is a piston head 92, that can be raised or lowered by the threaded shaft 63, on which there is the miter gear 64 meshing with its mate 95, which, in turn, is mounted on the shaft 96 operated by the sprocket chain 51 (see Fig. 2) .which chain is actuated by the shaft 68, on which there is the hand wheel 99, which is on the same side of the machine as the .leversA, B, C, D, etc. (see Figs. land 2).

The shaft 69 actuates, in turn, a lead screw 10 (Fig. 1). on which there is a pointer I l, which is adapted to move in front of a calibrated plate I2, so that the position of the piston head 62 may be observed as it is elevated or lowered in the cylinder 6| to thus determine the capacity of the measuring tank.

The inlet for the tank may be seen at I! leading into the pipe 14 and to the pipe 15, which latter pipe is connected at the top to an auxiliary tank 16.

' Between the pipes 13 and N, there is a valve II, which is operated by the ball float 19 to cut oil the supply after the auxiliary tank 16 is filled.

The pipe is provided with two valve chambers "and 90 having the respective valves 19' and 90'. The valve 19' is connected, as at 19a, to the shifting bar RP-9, and likewise, the valve 89' is connected, at 89a, about centrally of the said bar. The opposite endof the bar R-9 is connected, as at 93, to the rod R8, which, at its upper end, is pivotally secured to the arm :r-l3 mounted on the shaft 8-2, on the other end of which shaft, it will be remembered, are the two small arms H and a'F-Bf, one of which is operated by the block Bl to rock the shaft S2 and the other of the arms :c6' is connected to the water control lever B, as'will be shortly described.

Now, when this shaft 8-2 is rocked and the arm :ri3 is moved upwardly, it will cause the valve 99' to rise off its seat and discharge the contents of the tank into the mixing drum through the discharge WD that leads to the drum (not shown). At the same time, when the valve 90' is opened, the valve 19' is closed, so that only the measured quantity will be delivered to the mixing drum. On the other hand, when the shaft S2 returns to its normal position and the rod R-S lowers, as well as the forward end of the shifting bar R.-9, it will close the discharge valve 99' and open the valve 19', so tank will quickly refill.

From this it will be seen that as the skip raises, it will force the block Bi upwardly to, in time, rock the shaft S2 to thereby operate the valves of the water tank and discharge the that the water into the mixing drum during the elevation of the skip.

In Fig. 22, the discharge valve 89' is shown in its closed position, whereas in Fig. 23, the shaft 8-2 has been rocked and the discharge valve 99' is now in its open position.

The block 3-1 on the rod 1'tl is adjustable so that an exact timing of the rocking of the shaft v 8-2 can beset with relation to the elevation of the skip and the closing of the discharge chute, so that each batch of aggregates will have its supply of water.

It might be mentioned that the time required to discharge a full tank of water is approximately seventeen seconds, and the batch meter will be so arranged that the water control will be locked in a discharging condition for about twenty-one or twenty-two seconds, so that each batch of aggregates, when being mixed, will receive the measured amount of water.

Before explaining this locking mechanism, it will be noticed that the rod R-l (Fig. 18), on which the block B-I is fastened, extends for some distance above the shaft 8-2 and has its upper end fitting within a forked rod 96 (see Fig. 1), which rod may slide within the bracket 91 and has its other end bent downwardly and fastened, at 99, to a throw-over lever 90, which is pivoted, as at 9|.

The purpose of this construction is that should it be desired to throw out the water control for any reason, an upward movement of the throwover lever 90 will force the rod R-l to the right (Fig. 18), so that the block B-I will not be within the path of the arm .r9, and as the rod RI elevates, the block B-l, not contacting with the arm .r--6, will not, in turn, rock the shaft 8-2, which, it will be remembered, through the rod R--8 and R-9, operates the valves 19 and 80 of the water tank W.

On this shaft &-2, there is also the arm :r-6', similar to a:-6, which is connected to and actuated by the water control lever B, which is loosely'mounted, it will be remembered, on the shaft Sll.

Lever B Now, referring to Figs. 16, 16, 16 16, 18 and 19, the rod R3, as heretofore mentoned, is adjustably connected to the arm .1:6 at its one end and extends through a guide 92 on a bracket 93 secured just above the batch meter. The opposite end of the rod R-3 is connected, as at 94, to the long rod 95, that extends over to one arm 96 of the bellcrank, which latter is pivoted, as at 91, while the other arm 98 of the bell-crank lever is fastened to the link 99, which, in turn, is secured to the water control lever B, as may be seen in Figs. 16 and 16. The arm 96 of the bellcrank lever has the elongated slot 96' therein, in which the pin 96" fits, while directly back of the arm 96 is a pair of small lugs I90, between whch is pivoted a throw-over stop Nil to limit the stroke of the rod 95 and the rod R3. When this throw-over stop IOI is thrown upwardly and out of the path of the arm 96, the water control lever B may-.be pulled out to its fullest extent and allow a latch L-l to drop in front of a stop I02 on the rod R3, as will be shortly explained, but when the throw-over stop IOI is in the position shown in Fig. 16*, the water control lever B may be operated to rock the arm a:-5, and likewise its shaft S--2, to thereby, in turn, operate the valves 19 and 80' of the water tank. However, it will not lock the water control in a set position only to be operated by the batch set in the end of the latch LI the latch LI is designed to drop in front of the meter,- as will shortly be described.

Locking the water control Referring to the bracket 93 and the rod R-S, it will be seen that this rod R3 has a hardened stop set on the rod, the stop being designated by the numeral I02. There will also be seen pivoted to the bracket, as at I03, the latch LI, which, in turn, is to be lifted by an upward movement of the rod R2, which has the elongated slot I04 in its upper end, through which passes the pin I05 The nose I06 of adjacent end of the stop I02 when the rod R-3 is moved inwardly (Fig. 18), that is, to the left, by a rocking of the shaft S2 caused, in turn, by a rocking of the shaft S-I, which, it will be remembered, is operated by an upward movement of the skip. Likewise, a manual operation of the water control lever B through the rod 95 and the rod R-3 will pull the rod R-3 to the left far enough to permit the latch L-I to drop' in front of the stop I02, provided the throw-over stop IOI is out of the path of movement of the arm 96. Thus, the water can be controlled both automat- .cally by the elevation of the skip and manually by the water'control lever B. It is often desirable, however, to flush out the drum and still not lock the water control in position, that is, only to be opened by the batch meter, as will be shortly explained, and by throwing the throw-over stop IOI,'a movement of the water control lever B will cause the rods 95 and R3 to rock the shaft 3-2 to turn on the water, but it will not permit the latch LI to drop down in front of the hardened {ace I02 as the stroke of R'3 is limited by the throw-over stop II, as just explained. Thus,

the operator can throw this stop IOI and flush the mixing drum at any time without looking the water control with relation to the batch meter.

Batch meter The batch meter I3 is shown in detail in Fig. 18 and will be described briefly.

It is essentially the batch meter shown in the patent of Charles E. Foote, Number 1,419,451, heretofore mentioned.

Generally speaking, there is a drive shaft I01 with its pinion I08, that is operated by one of the ring gears 3 on the mixing drum, which shaft I0! is provided with a worm I09 to operate the worm gear H0. The gear IIO operates the shaft H0 and pinion III, which, in turn, meshes with the gear II2 mounted on the shaft II3, on which shaft there is the pinion II4, which pinion is designed to be thrown into and out of mesh with the sector II5, which is pivoted, at H6, in. the batch meter. The gear H2 and pinion II4 with their shaft II3 are carried in the housing arms In, to which is fastened the rod II8, which, in turn, passes through the adjustable lug I I9, which latter is secured to the main rod 58 of the batch meter. There is a spring I20 located between the adjustable lug H9 and the washer I2I on the rod H8, so that an inward movement of the rod 58 willcause the pinion II4 to swing into mesh with the gear segment II 5.and slowly elevate the same.

There are a number of apertures I22 in the segment H5, in any one of which may be placed a pin I22, so that as the segment rises after so many seconds or revolutions of the mixing drum and the worm shaft I0'I, this pin I22 will strike the trigger arm I23, which is pivoted, at I24, and

carries the trigger finger I25, that will slip from the notch I26 when the rod 58 is pushed inwardly at the time it is forced by the plate 51 mounted on the arm :c-I5, which, it will be remembered, is, in turn, actuated by the clutch 560-561) and the sleeve S--L. Thus, when the segment H5 is raised, as heretofore mentioned, it will contact with the arm I23 and raise the same and lift the finger I25 from the notch I26 and permit the spring I20 to force the rod 58 back to its normal position. The rod 58 is then in position to be operated again when the sleeve S--L is turned by the upward movement of the skip. When the rod 58 goes back to its normal position, the segment II5 will drop to the position shown in Fig. 18 and the small pinion II4 will not be in mesh with the teeth of the sector II5 until the rod 58 is again forced inwardly by the elevation of the skip. By placing the pin I22 in a higher or lower aperture, the time for the operation of the batch meter is regulated. v

In Fig. 18, the latch L-I is shown above the stop I 06, but it will be understood that when the skip elevates and the shaft SI is rocked, likewise when the block B-I contacts with the arm a:-$ and rocks the shaft S-2, it will move the rod R-3 and its hardened stop I05 beyond the nose of the latch LI, and the latch L--I will drop and prevent the rod R-3 from returning until such time as the rod R-2, connected with the segment II5, has raised, so that the pin I05 will finally engage the lower end wall of the slot I04, that is, after the requisite number of seconds, and lift the latch L--I and let the spring I21, which is fastened on the far end of the shaft S-2 (see Fig. 22) rock the shaft S2 back to its normal position and cut off the water discharge, that is, close the valve 80 and open the valve I9 of the water tank.

It will be understood that when the latch L--I once gets behind the stop I06, the operator cannot use the manual water control lever B until such time as the batch meter has gone through its set number of revolutions. 1

Still referring to Fig. 18, it will be seen that the main control rod 58 is connected at its one end to the rod RI4, which extends upwardly along the drum and directly in back of the levers A, B, and C, as the power discharge is to be auto"- matically locked during the mixing of the aggregates and cannot be even manually operated until such time as the batch meter has completed its certain set number of revolutions.

It might be mentioned that batch meters are provided primarily to lock the discharge chute after the aggregates'enter the drum, until the requisite number of turns or the required number of seconds have elapsed, which time limit is arranged by the laws of the different States.

Now, R-I4, that is, the rod connecting with the batch meter, has a short arm :r-IB (see Fig. 24) provided with the pin I28, that is designed to fit behind the roller I29 formed at the outer end of a small inwardly extending bracket I30 formed on the inner face of the power discharge lever C.

Thus, when the batch meter rod 58 is in its normal position, as shown in Fig. 18, that is, before being operated by the arm a:I5, forcing it inwardly, the pin I28 on the arm :r-I8 mounted on the rod R-I4 will not be behind the roller I29 and the lever C could be manually operated to open or close the discharge chute. However, after the skip is elevated through its first twentytwo and one-half degrees, it will be remembered that the arm :c-I5 will force the rod 58 of the 

